摘要
对410不锈钢试样分别进行了能量为0.1 J和1.0 J的激光冲击处理。检测了试样的表面粗糙度及激光冲击层的显微组织、硬度分布和残余应力分布,并与未经激光冲击的试样进行了对比。结果表明:以不同能量的激光冲击后试样表层发生了轻微的塑性变形,但显微组织没有变化仍为马氏体;与未经激光冲击的试样相比,经0.1 J激光冲击的试样表面粗糙度从7.89μm减小到了5.77μm,而经1.0 J激光冲击的试样表面粗糙度提高到了9.32μm;经0.1 J和1.0 J激光冲击的试样截面的最高硬度相应为504 HV0.05和499 HV0.05,最大残余应力相应为-513 MPa和-491 MPa,影响层深度约为600μm。低能激光冲击处理的效果与高能激光冲击处理的相近。
China 410 stainless steel specimens were shock processed by lasers with energies of 0.1 and 1.0 J,respectively.The specimens were tested for surface roughness,as well as for microstructure and distributions of both hardness and residual stress in the laser shocked case,and compared with those of the specimen not be laser chocked.The results showed that(a)slight plastic deformation occurred but microstructure did not change and still was martensite in the specimen case after shock processing with different energies of laser;(b)surface roughness of specimen decreased from 7.89μm when not laser shocked to 5.77μm after o.1 J laser shock processing,as well as increased from from 7.89μm when not laser shocked to 9.32μm after 1.0 J laser shock processing;and(c)maximum section hardness of the specimens shock processed by 0.1 and 1.0 J laser were respectively 504 and 499 HV0.05,their maximum section residual stresses were respectively-513 and-491 MPa,the depth of affected layer was about 600μm.The low-energy laser shock processing is comparable in effectiveness to the high-energy laser shock processing.
作者
陆海峰
姚志猛
吴树辉
陈国星
覃恩伟
魏少翀
LU Haifeng;YAO Zhimeng;WU Shuhui;CHEN Guoxing;QIN Enwei;WEI Shaochong(Suzhou Nuclear Power Research Institute Co.,Ltd.,Suzhou 215004,Jiangsu China;Yangjiang Nuclear Power Co.,Ltd.,Yangjiang 529500,Guangdong)
出处
《热处理》
CAS
2023年第3期1-4,共4页
Heat Treatment
基金
中国广核集团尖峰计划项目“核电厂关键设备在役检查、维修先进技术研究和示范应用”(3100129115)。
关键词
激光冲击
马氏体不锈钢
显微组织
表面粗糙度
残余应力
laser shock
martesitic stainless steel
microstructure
surface roughness
residual stress
